Weather stripping



May 10, 1955 J. MY LEwls 2,707,812

WEATHER STRIPPING Filed Aug. 9, 1951 I i i .z 16J? .a /1

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JosphMzczaelLewzs ffl/@13% United States Patent O WEATHER STRIPPING Joseph Michael Lewis, Los Angeles, Calif., assignor to J. Michael Lewis and Grant A. Burke, partners, a copartuership Application August 9, 1951, Serial No. 241,114

8 Claims. (Cl. 20-69) The present invention relates to weather stripping in general and particularly to a new and improved type of weather strip adapted readily to be positioned manually without the use of special tools and Which retains itself in place by a clamping action resulting from its own inherent resilience. More specifically the inven tion comprises a snap-on Weather stripping which may be mounted upon new or installed window sash casings by a simple manual positioning operation without the use of special tools.

The use of weather stripping to prevent undesirable leakage of air and Water between a window sash and its surrounding casing is a common expedient particularly in those parts of the country having rigorous winters. While a window may perform its primary function of permitting those within a building to look out and also of permitting exterior light to enter, the presence of a loose lit between the window sash and its surrounding casing transforms that window into an expensive luxury and an undesirable neighbor during those seasons of the year in which outdoor temperatures are extremely low and particularly when there is a strong wind. By the use of Weather stripping upon the sash and its surrounding casing leakage of heat and air can be reduced almost to the point of elimination and the resulting saving in fuel and the increase in comfort more than makes the expense worth while.

With an appreciation of the problems inherent in the field to which the invention relates it is a primary object to provide a new and improved weather stripping which may be snapped in place by unskilled persons and which, when installed, functions etliciently as a seal to prevent the passage of heat and air between the window sash and its surrounding casing upon which the cooperating parts are mounted.

It is another object of the present invention to provide an improved self-clamping weather stripping for window sash and frames.

A further object of the invention is to provide a selfclamping weather stripping for window sash and casings in which the weather stripping is resiliently clamped in place and in which cooperative elements interengage to provide a substantially air-tight seal.

A further object of the invention is to provide simple snap-on weather stripping elements adapted to seat upon metallic windows and frames made of Z-sectioned members.

These and other more specific objects will appear upon reading the following specilication and claims and upon considering in connection therewith the attached drawingl to which they relate.

Referring now to the drawing in which preferred embodiments of the present invention are disclosed:

Figure l is a partial side elevational view of a window sash and its surrounding casing upon both of which weather stripping constructed in accordance with a preferred embodiment of the present invention has been rice installed, certain parts being broken away and shown in section;

Figure 2 is a broken horizontal section upon the line 2-2 of Figure 1 and illustrates the weather strip ping elements operatively positioned upon the window sash and casing and the relative position of the stripping upon those two parts prior to the complete closing of the window sash;

Figure 3 is a section similar to Figure 2 but with the window completely closed and the weather stripping in its sealing relationship;

Figure 4 is a perspective view of a length of the female unit of the weather strip constructed in accordance with the first preferred embodiment of the invention which is adapted to be mounted upon three sides of a window casing, that is, upon all of its sides save the side extending between the sash pivots;

Figure 5 is a view in perspective of a short length of the male unit of the weather strip which is carried by the window sash upon all three of its sides excepting only that extending between the sash pivots;

Figure 6 is a view in perspective of a short length of the female weather strip unit adapted to be mounted upon the casing side extended between the pivots;

Figure 7 is a view of a modified form of the female weather strip which may be substituted for the form shown in Figure 4; and

Figure 8 is a view in perspective of a modifedform of the male weather strip which may be substituted for the form shown in Figure 5.

Referring again to the drawing and to Figures l to 6, inclusive, in particular, a first preferred form of the invention is illustrated mounted upon a conventional metallic window unit comprising a window sash, indicated generally by 10, and a window casing, indicated gene erally by 11. The exact size and shape of the window sash and its casing are not of the essence although in general it will be rectangular or square and straightsided. Each of the sides of the sash and of the casingis a Z in cross section, and the sash is pivoted to the casing by upper and lower pairsv of integral arms 12 and 13 pivotally connected by pins 14. The upper pivotal mounting only is illustrated in Figure l but it is to be understood that a similar mounting is located a the lower right-hand corner.

Each side of the window sash is generally Z-sectioned and may be said to comprise a central run 16 from one side of which extends at right angles an outer ange 17 and from the other side of which extends at right angles an inner flange 18 formed with a minor overhang 19. The four sides are identical.

Referring now to the window casing 11, each side mermber thereof viewed in section, as illustrated in Figures 2 and 3, may be said to comprise a central run 21 from the opposite sides of which extend outer and inner ilanges 22' and 23, respectively, each including a minor overhang upon the opposite face of the run 21 which overhangs are indicated by the reference characters 26 and 27, respectively. As in the case of the window 10 the four sides of the Window frame 11 may be said to be identical.

As is seen clearly in Figures '2 and 3 in particular, the sash 10 moves about a pivotal axis through the pivot 14 and into and from seating relationship with the casing 11. The inner flange 1S of the window sash moves into juxtaposition with respect to the inner flange 23 of the cas- Y ing, while the outer flange 17 of the sash moves into abutting contact with the corresponding outer flange 22 of the casing. With a glass extendedbetween the four sides of the sash the leakage which is to be eliminatedby the present invention takes place between the sash and casing 11.

To seal the leakage between the sash 10 and frame 11 J along what may be called the pivot side of the casing the structure provided differs from that used upon the other sides. Because of the relatively slight movement which takes place there and in view of the presence of the overhang19 on the inner ange 18 of the window sash, it has been found that satisfactory scaling can be obtained here by the provision of a female weather strip unit only. This unit, indicated generally by the reference character 30 in Figure 6, is formed of an elongated strip of sheet metal rolled to provide two oppositely facing U-sectioned channels, indicated by the reference characters 31 and 32. Channel 31 is sized as to seat in clamping relationship upon the inner flange 23 of the casing 11 and to be retained there by its own resilience. To insure a tight resilient fit the edge of the side wall of channel 31 is bent inwardly at 33 to compensate for variations in flange thickness of various windows. U-sectioned channel 32, on the other hand, is sized as to receive and snugly seat in the minor overhang 19 of inner iiange 13 of the sash 10 and to provide a sealing contact along its length therewith. The resilient clamping relationship between the seating channel 31 and flange 23 prevents lateral displacement of the strip 30, while the abutment of its upper and lower ends with the sealing strip carried by the top and bottom sides of the frame prevents longitudinal displacement. If desired, strip 30 can be spot welded in place or otherwise suitably secured but such retaining means are not necessary and the resilient clamping of the unit itself is adequate.

The female sealing strip provided upon the three sides of the window frame 11 in addition to the side seating strip 30 is illustrated in Figure 4 and is indicated generally by the reference character 35. It is seen to comprise an elongated strip of sheet metal having a natural resilience within its elastic limits and deformed, as by rolling while in strip form, to provide a sectional configuration which adapts it to seat upon the frame. Specifically the female sealing unit 35 comprises a frame-clamping U-sectioned channel 36 formed of an outer run 37 and an inner run 38 connected by a U-bend. Run 37 is angled inwardly along its edge at 37a to insure a clamping action on flange seated in channel 36 despite variations in "flange thickness. A flat run 39 extends back upon the run 38 at a slight angle and carries a second U-sectioned channel 41 formed of an inner run 42 and an outer run 43 connected thereto by a U-bend. Run 43 is laterally displaceable from the run 42 upon the insertion of a male sealing member and the carrying run 39 similarly is displaceable toward and from the run 38. This form in its mounted position upon the casing is shown clearly in Figures 2 and 3. Attention is directed to the fact that prior to contact by the sash, as illustrated in Figure 2, the sealing U-seat channel 41 is held in an advanced position, that is, toward the approaching window, by 'the resilient carrying run 39.

Referring now to Figures 2, 3, and in particular, the male weather strip adapted to be carried by the sash and to cooperate with the female strip just described is illustrated and is indicated generally by the reference character 45. Unit 45 comprises a U-channel 46 sized to seat in clamping relationship the outer flange 17 of sash 10 and formed by an outer run 47 and an inner run 48. The edge of the outer run is angled inwardly at 47a for the same purpose served by the inturned edge 37a in channel 36. From the inner run 48 extends at right angles a central run 49 adapted to lie adjacent the central run 16 of sash '10, as illustrated in Figures 2 and 3. At the opposite end of run 49 from the channel 46 is provided a groove or channel 51 positioned and sized to seat minor overhang 19 of the sash inner flange 18. A transverse run 52, which forms one side of the channel 51, extends parallel to the sides 47 and 48 of channel 46 and is positioned to lie adjacent sash inner flange 18. Run 52 at its end carries a right-angle run 53 doubled back upon itself to form a male sealing member adapted to seat sealingly in the channel 41 of female strip unit 35. The dimensions of male member 53 are such that it makes sealing contact with the sides of channel 41 and contacts the bottom of that channel prior to the engagement of run 52 on the sash with the displaceable resilient run 39 on the frame. The complete seating of the sash produces a sealing engagement between the male member 53 and the female channel 41 and additionally a sealing contact between the abutting runs 52 and 39.

The positioning of the weather stripping constructed in accordance with this first preferred embodiment of the invention is relatively simple. Referring first to the unit 30 positioned between the pivotal pins of the window, that unit is seated simply by forcing it laterally onto the inner ange 23 of casing 11. When the channel 31 is fully seated upon flange 23 the unit is in place and its sealing channel 32 is properly positioned to receive the minor overhang 19 of window ange 18. The opposite ends of the unit 30 may be cut diagonally as to abut the angularly extending weather strip units 35 in the manner illustrated in Figure l.

The positioning of the female strip units 35 upon the other three sides of the casing is also relatively simple and requires only the telescoping of the seating channel 36 over the inner flange 23 of the casing side in each instance. Similarly the positioning of the male unit 45 upon the three sides of the window sash which cooperate with the frame sides carrying female units 35 is simple and comprises merely forcing over the outer sash flange 17 the seating channel 46 of thc unit. With the latter fully seated the channel 51 seats the minor overhang 19 of the inner flange 1S of the sash and the male sealing member 53 is positioned in proper alignment along each side to engage and seal with the sealing channel 41 of the cooperating female unit 35. The relationship is such that as the sash is moved from its open position, illustrated in Figure 2, to its closed position, illustrated in Figure 3, the male member 53 engages and seals in the female channel 41 and the male member run 52 contacts in sealing abutment the displaceable resilient run 39 of the female unit 35. Leakage between the window and the casing is thus eliminated.

Referring now to the modified embodiment illustrated in Figure 7, there is shown a female unit indicated generally by the reference character 55 which may be substituted for the unit 35 illustrated in Figure 4. The unit 55 comprises a channel 56, corresponding to the channel 36 of the model or embodiment 35, formed of spaced sides or runs 57 and 58 spaced as to engage and seat frictionally the inner ange 23 of casing 11. The outer end of run 57 is inclined inwardly at 57a in the manner of the inclined portions 37a and 47a and for the same reason. From the outer end of the run S7 of channel 56 there extends at a slight angle a resilient run 59 corresponding to the run 39 of unit 35 but differing therefrom in that run 59 is adapted to be positioned upon the side of casing flange 23 spaced from sash 10 while run 39 is positioned as to be contacted by the run 52 of the window-carried male member 45. At r4its outer end flexible run 59 carries a right-angled run 61 spaced from the end 62 of channel 56 so as to form therebetween a channel 63, the medial axis or plane of which extends at right angles to the medial plane of channel 56.

The female strip 55 is adapted to be positioned upon the window casing 11 simply by forcing its channel 56 upon the inner flange 23 of the casing and when so positioned flexible run 59 is positioned upon that side of flange 23 spaced from the sash. The edge of male sealing member 53 of unit 45 makes contact with the bottom of channel 63 prior to the complete seating of the sash and the member 59 is pivoted from casing 11 as the sash moves into closed position. Additionally the run 61 forming one side of the channel 63 is latamante erally displaceable as required by sealing contact with the male sealing member 53.

Referring now to Figure 8 in particular, a second preferred embodiment of a male strip unit is illustrated, being indicated generally by the reference character 65. This unit may replace unit 45, illustrated in Figure 5, and differs therefrom in that unit 45 extendsacross the entire inner face of the side of the sash to enclose and seat frictionally the inner flange 18 of the window in its own seating channel 46. Male unit 65, however, is constructed and designed to clamp upon the inner liange 18 only of the sash 10 and to accomplish this purpose is provided with a central run 66 formed at one end with an inwardly concave channel-forming flange 67, adapted to enclose the end of the minor overhang 19 of the sash flange 18, and at its opposite end with an inwardly convex curved flange 68 adapted to malte frictional abutting contact with the opposite side of sash inner ange 1S and to exert a resilient force which draws the llange 67 over and into sealing `Contact with the minor overhang 19. A male sealing element, conical in cross section and indicated by the reference character 69, extends from the central run 66 of unit 65 and in a direction opposite from that of anges 67 and 68 being so positioned that with the unit 65 seated upon the sash inner ange 18 the male sealing member 69 is positioned as to engage within the channel 41 of female sealing unit 35, or channel 63 of the substitute sealing member 55, whichever is in use.

While the particular construction herein shown and described in detail is fully capable of attaining the objects and providing the advantages hereinbefore stated, it is to be understood that it is merely illustrative of the presently preferred embodiments of the invention and that no limitations are intended to the details of construction or design herein shown other than as dened in the appended claims.

I claim:

1. A weather strip for use on a window sash and frame of the Z-sectioned type and in which the inner and outer lianges of the Z extend substantially parallel to the plane of the Window with the sash in closed position; said weather strip comprising a female unit having two elongated U-sectioned channels the medial planes of which are mutually perpendicular, one of said cha;- nels being sized to clamp resiliently a flange of said frame, and the other of said channels opening toward said sash and being adapted to receive a male sealing element, said other of said channels being resiliently connected to said one channel for displacement substantially vertically to the medial plane of said one channel under a force received from a male sealing member.

2. A weather strip for use on a window sash and frame of the Z-sectioned type and in which the inner and outer flanges of the Z extend substantially parallr;

to the plane of the window with the sash in closed position; said weather strip comprising a female unit having two elongated U-sectioned channels the medial planes of which are mutually perpendicular, one of said channels being sized to clamp resiliently a flange of said fram., the other of said channels being positioned at the closed end of said one of said channels and opening toward said sash and being adapted to receive a male sealing member, characterized in that said other or" said channels is displaceably connected to said one channel ar: in that the connection between said channels is adapted to be abutted by said male sealing member to create a seal additional to that effected by penetration of said male sealing member into said other channel.

3. A weather strip for window sash or frame of tlt'r. type in which the sides are individually Z-sectioned and are formed with a central portion and inner and outer anges which lie substantially parallel to the plane of the window; said weather strip comprising an elongated strip of sheet metal formed as a channel comprising a central run having llanges along its opposite sides suitable to clamp resiliently and resist displacement from one of said llanges of said sash, and as a sealing element the medial plane of which extends normally to the medial plane of said channel, said sealing element comprising a raised shoulder extended along said central run of said channel and having flat sides integral with said run and meeting at an acute angle.

4. Weather stripping for a window frame and window sash each having a peripheral flange extending inwardly and parallel to the plane of the window with the sash in closed position; said weather stripping comprising a female unit formed of metal and having two elongated U- sectioned channels the medial planes of which are mutually perpendicular, one of said channels being sized to fit resiliently over one side of the flange on said frame and the other of said channels being positioned at the closed end of said one channel and being adapted to face toward said sash, and a male unit formed of metal and having llanges adapted to fit resiliently over the flange on said sash, said male unit also having a tongue adapted to sealingly penetrate said other of said channels.

5. The construction recited by claim 4 characterized in that said other of said channels is resiliently supported on said one of said channels by a resilient run connecting the open ends of said channels.

6. The construction recited in claim 5 characterized in that said run comprises a strip of metal integral with said channels and disposed to be abutted by the body portion of said male unit to effect a seal additional to that effected by penetration of said tongue into said other of said channels'.

7. Weather stripping for a window the frame and sash of which are Z-sectioned; said weather stripping comprising a female sealing unit carried by said frame comprising a lirst channel enclosing one edge of the flange forming the inner side of the frame Z, a second channel at the closed end of said lirst channel, and a at run connecting the open ends of said channels and normally holding said second channel resiliently in an advanced position, a male sealing unit comprising a relatively wide channel adapted to enclose the inner side of the sash Z and formed of a central run with side flanges adapted to resiliently clamp said inner side, and a male sealing member extended lengthwise of said central run between said side flanges and in the opposite direction from said flanges, said male sealing member being sized to lit sealingly within said second channel and to displace said second channel as said male sealing member moves into sealing engagement with said female sealing member, the extension of said male sealing member from said central run being such that said central run contacts and makes sealing contact with said flat run of said female member before said female member is displaced to its maximum displacement by the engagement therewith of said male sealing member.

8. Weather stripping for a window frame and window sash pivotally connected to each other and each having a peripheral flange extending inwardly and parallel to the plane of the window with the sash in closed position, said sash also having an overhanging lip formed oppositely of its peripheral ange; said weather stripping comprising a generally S-shaped strip one channel of which is adapted to clamp resiliently over the peripheral flange of said frame along the side thereof pivotally connected to said sash, the other channel of said strip being adapted to receive said overhanging lip in sealing relationship.

References Cited in the le of this patent 

